Nang Lok Ellick Tsang, M.D.
Internal Medicine Physician · San Francisco, CA
Nang Lok Ellick Tsang, M.D. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1992873723, issued on Dec 1, 2006. Check the license (California CA A053928, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nang Lok Ellick Tsang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- CA A053928 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3085 24TH St, San Francisco, CA 94110
- Phone
- (415) 648-5900
- Enumerated
- Dec 1, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (650) 491-7735
- Medicaid ID
- 00A539280 CA
- Medicare enrollment
- Enrolled (PECOS I20090501000398); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Nang Lok Ellick Tsang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license CA A053928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% more Medicare Part D claims than the average internal medicine physician in 2024
5,863 Medicare Part D claims for 312 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 116 claims were for opioids.
Most prescribed
- Amlodipine Besylate347 claims
- Atorvastatin Calcium282 claims
- Pantoprazole Sodium240 claims
- Metformin Hcl217 claims
- Eliquis189 claims
- Furosemide172 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,020.81
38 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Nang Lok Ellick Tsang among 17,696 internal medicine physician records in California
Nang Lok Ellick Tsang, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Neal Benowitz, MDSan Francisco, CA 941101538103411
- Ann Bolger, MDSan Francisco, CA 941101457395352
- Howard Graves, MD PHDSan Francisco, CA 941101427090869
- Stephen Hoffman, MDSan Francisco, CA 941101265476147
- Daniel Kahler, D.O.San Francisco, CA 941101629019781
- Jeanette Krolikowski, D.O.San Francisco, CA 941101962471920
- John Metcalfe, M.D.San Francisco, CA 941101154399350
- Hedda Orkin, MDSan Francisco, CA 941101093753030
Common questions
What is Nang Lok Ellick Tsang, M.D.'s NPI number?
Nang Lok Ellick Tsang, M.D.'s National Provider Identifier (NPI) is 1992873723, issued on Dec 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nang Lok Ellick Tsang, M.D. located?
The NPPES record lists a practice address at 3085 24TH St, San Francisco, CA, 94110. Phone: (415) 648-5900. Providers update this record themselves, so call before visiting.
How can I verify Nang Lok Ellick Tsang, M.D.'s license?
NPPES lists California license number CA A053928, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nang Lok Ellick Tsang, M.D. prescribe under Medicare Part D?
In 2024, Nang Lok Ellick Tsang, M.D. had 5,863 Medicare Part D claims for 312 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.